Definition of Know
Quick Meaning of Know
To understand or have information about something; to be familiar with someone or a place.
Detailed Definition of Know
To have information, awareness, or understanding of something in your mind; to be familiar with a person or place.
How to Pronounce Know
Stress pattern: O (1-syllable word).
Tip: One syllable with long /oʊ/ vowel like 'o' in 'go' or 'boat'. The 'kn' sound starts with just /n/, not /kn/.
Watch out: The 'k' at the beginning is silent; pronounce only the /n/ sound /noʊ/.
Origin and Etymology of Know
From Old English 'cnawan', related to Germanic and Indo-European languages meaning to perceive or know.
How to Use Know in a Sentence
Each example shows “know” with a CEFR level so learners can pick examples that match their fluency.
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“I know your sister from school.”
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“Do you know where the library is?”
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“She knew the answer to the difficult question immediately.”
Synonyms and Antonyms of Know
Common Synonyms for Know
Smart Synonyms for Know — When to Use Each
- understand
- for comprehending meaning or significance
- recognize
- for identifying someone or something familiar
- be aware of
- for having knowledge of a situation or fact
Antonyms of Know
Common Collocations with Know
These phrases pair with “know” in everyday English:
- know well
- know about
- know the answer
- get to know
- known to
Common Mistakes When Using Know
Even fluent speakers slip up with “know”. Here’s how to avoid the most common errors:
- ✗ Wrong: I known her for five years.
- ✓ Correct: I have known her for five years.
- Why: Use present perfect 'have known' for duration from past until now, not past participle 'known' alone.
- ✗ Wrong: Do you knew the way to the station?
- ✓ Correct: Do you know the way to the station?
- Why: In question form with 'do', use base form 'know', not past tense 'knew'.
Words Confused With Know
- Know vs Understand: Know = have information; understand = comprehend meaning or reasons behind something. Compare →
Other Forms of Know
Frequently Asked Questions About Know
What is the meaning of "Know"?
To understand or have information about something; to be familiar with someone or a place.
How do you pronounce "Know"?
The IPA is /noʊ/. One syllable with long /oʊ/ vowel like 'o' in 'go' or 'boat'. The 'kn' sound starts with just /n/, not /kn/.
What part of speech is "Know"?
"Know" is a verb at A1 level (Common European Framework).
What are synonyms for "Know"?
Common synonyms include understand, recognize, be aware of.
How do you use "Know" in a sentence?
For example: "I know your sister from school."